Epson EPL-N2000 Reference Manual page 94

Duplex
Selects the duplex printing on or off. This item is available only
when the Duplex Unit is installed.
Binding
Selects the binding direction of the printout. This item is
available only when the Duplex Unit is installed.
Start Page
Specifies to print from either front or back at first. This item is
available only when the Duplex Unit is installed.
Back Shift
Adjusts the printing position on the back side when printing on
both sides. Use this if the printout on the back side is not where
you expected. This item is available only when the Duplex Unit
is installed.
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Remote Control Panel Utility